diff --git a/conda/environments/all_cuda-118_arch-aarch64.yaml b/conda/environments/all_cuda-118_arch-aarch64.yaml
index 54cbb12072..daeaa4272c 100644
--- a/conda/environments/all_cuda-118_arch-aarch64.yaml
+++ b/conda/environments/all_cuda-118_arch-aarch64.yaml
@@ -9,7 +9,7 @@ dependencies:
 - boto3>=1.21.21
 - c-compiler
 - cmake>=3.26.4,!=3.30.0
-- cuda-python>=11.7.1,<12.0a0
+- cuda-python>=11.7.1,<12.0a0,!=11.8.4
 - cuda-version=11.8
 - cudatoolkit
 - cupy>=12.0.0
diff --git a/conda/environments/all_cuda-118_arch-x86_64.yaml b/conda/environments/all_cuda-118_arch-x86_64.yaml
index ff3da55951..0a9517431b 100644
--- a/conda/environments/all_cuda-118_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-118_arch-x86_64.yaml
@@ -9,7 +9,7 @@ dependencies:
 - boto3>=1.21.21
 - c-compiler
 - cmake>=3.26.4,!=3.30.0
-- cuda-python>=11.7.1,<12.0a0
+- cuda-python>=11.7.1,<12.0a0,!=11.8.4
 - cuda-version=11.8
 - cudatoolkit
 - cupy>=12.0.0
diff --git a/conda/environments/all_cuda-125_arch-aarch64.yaml b/conda/environments/all_cuda-125_arch-aarch64.yaml
index 41f6e6b3a3..bbf2c33a6f 100644
--- a/conda/environments/all_cuda-125_arch-aarch64.yaml
+++ b/conda/environments/all_cuda-125_arch-aarch64.yaml
@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - cmake>=3.26.4,!=3.30.0
 - cuda-nvcc
-- cuda-python>=12.0,<13.0a0
+- cuda-python>=12.0,<13.0a0,!=12.6.1
 - cuda-version=12.5
 - cupy>=12.0.0
 - cxx-compiler
diff --git a/conda/environments/all_cuda-125_arch-x86_64.yaml b/conda/environments/all_cuda-125_arch-x86_64.yaml
index cab86c6fdc..261017db97 100644
--- a/conda/environments/all_cuda-125_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-125_arch-x86_64.yaml
@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - cmake>=3.26.4,!=3.30.0
 - cuda-nvcc
-- cuda-python>=12.0,<13.0a0
+- cuda-python>=12.0,<13.0a0,!=12.6.1
 - cuda-version=12.5
 - cupy>=12.0.0
 - cxx-compiler
diff --git a/dependencies.yaml b/dependencies.yaml
index b80ed69337..7ec7ab6b8a 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -384,7 +384,7 @@ dependencies:
           - matrix:
               cuda: "12.*"
             packages:
-              - cuda-python>=12.0,<13.0a0
+              - cuda-python>=12.0,<13.0a0,!=12.6.1
           - matrix: # All CUDA 11 versions
             packages:
-              - cuda-python>=11.7.1,<12.0a0
+              - cuda-python>=11.7.1,<12.0a0,!=11.8.4
diff --git a/python/kvikio/pyproject.toml b/python/kvikio/pyproject.toml
index 5921e4b762..79ad94ecde 100644
--- a/python/kvikio/pyproject.toml
+++ b/python/kvikio/pyproject.toml
@@ -41,7 +41,7 @@ classifiers = [
 [project.optional-dependencies]
 test = [
     "boto3>=1.21.21",
-    "cuda-python>=11.7.1,<12.0a0",
+    "cuda-python>=11.7.1,<12.0a0,!=11.8.4",
     "dask>=2022.05.2",
     "moto[server]>=4.0.8",
     "pytest",